Re: machine size real numbers?
- To: mathgroup at smc.vnet.net
- Subject: [mg35811] Re: [mg35800] machine size real numbers?
- From: BobHanlon at aol.com
- Date: Fri, 2 Aug 2002 02:41:36 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
In a message dated 8/1/02 6:11:25 AM, rkdyer at cecs.pdx.edu writes:
>In[1]:=
>x[t_] := 1 + Cos(2000*Pi*t) + Sin(4000*Pi*t)
>
>In[2]:=
>Plot[x, {t, 0, 8000*Pi}]
>
>Plot::"plnr": x is not a machine-size real number at t =
>0.0010471975511965976
>
>Plot::"plnr": x is not a machine-size real number at t =
>1019.5597016296903
>
>Plot::"plnr": x is not a machine-size real number at t =
>2131.4776207838036
>
>General::"stop": Further output of Plot :: "plnr" will be suppressed
>during this calculation
>
>I am trying to plot the function x(t) defined above, same thing
>happens when i try to plot other similar functions always get an error
>saying that the machine size number is nor real, I have tried to find
>an answer in this message group, as well as the mathematica help
>online and built in, if someone knows what is going on please help me.
>
>My computer is an AMD 1Gig with 256MG of ram, if that is of
>consequence. Windows XP pro
x[t_] := 1 + Cos[2000*Pi*t] + Sin[4000*Pi*t];
Plot[x[t], {t, 0, 8000*Pi}];
Although for this many cycles you need to increase the PlotPoints to get an
accurate Plot at which point it would be quicker to draw a filled rectangle.
Bob Hanlon
Chantilly, VA USA